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Finding the Fourth Proportional to 6,805.12, 10,139.28 and 6,358.08

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Solution

The fourth proportional to 6,805.12, 10,139.28 and 6,358.08 is: 9,473.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,805.12 : 10,139.28 = 6,358.08 : x
  2. Step 2: Convert to fraction form
    6,805.12/10,139.28 = 6,358.08/x
  3. Step 3: Cross multiply
    6,805.12x = 10,139.28 × 6,358.08
  4. Step 4: Simplify right side
    6,805.12x = 64,466,353.38
  5. Step 5: Solve for x
    x = 64,466,353.38/6,805.12
  6. Step 6: Final answer
    x = 9,473.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.